Welcome to the North American Subaru Impreza Owners Club Sunday April 19, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC General > Motorsports

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 04-08-2010, 01:35 PM   #1
STi-MAN
Scooby Guru
 
Member#: 70252
Join Date: Sep 2004
Vehicle:
05 STI
blue

Default next size up from m12 x 1.25?

so made the noob mistake of stripping the chassis hole for a m12 x 1.25 bolt.. i think a local shop is just gonna see if they can fix it.. but wondering if they retap.. what would be the next size up in bolt.

this is for a harness to chassis bolt.

thanks in adv.
* Registered users of the site do not see these ads.
STi-MAN is offline   Reply With Quote
Old 04-08-2010, 02:09 PM   #2
boost junkie
Top Scoob 009
 
Member#: 68273
Join Date: Aug 2004
Chapter/Region: MAIC
Location: Silver Spring, MD
Vehicle:
2012 WRX
GD Race Car in progress

Default

Harness as in a safety belt? No way I'd trust tapping to a larger size for that application. I'd either cut off the nut behind the panel and weld in a new one, or at least drill out and helicoil the existing one.
boost junkie is offline   Reply With Quote
Old 04-08-2010, 02:11 PM   #3
subielife
Scooby Newbie
 
Member#: 181524
Join Date: Jun 2008
Chapter/Region: Tri-State
Location: NEPA or the track
Vehicle:
2013 BRZ & Prius
Blue/White

Default

M14 X 2.00
subielife is offline   Reply With Quote
Old 04-08-2010, 02:11 PM   #4
STi-MAN
Scooby Guru
 
Member#: 70252
Join Date: Sep 2004
Vehicle:
05 STI
blue

Default

Quote:
Originally Posted by boost junkie View Post
Harness as in a safety belt? No way I'd trust tapping to a larger size for that application. I'd either cut off the nut behind the panel and weld in a new one, or at least drill out and helicoil the existing one.
yeah thats the bolt.. i was looking into the helicoil.. i think i didnt strip all the threads so they're going to try and fix it.. if not i'll helicoil it for the added safety..

thanks for the input.
STi-MAN is offline   Reply With Quote
Old 04-08-2010, 02:55 PM   #5
fliz
Scooby Guru
 
Member#: 30342
Join Date: Nov 2002
Location: #blp
Default

1/2".
fliz is offline   Reply With Quote
Old 04-08-2010, 04:53 PM   #6
Turn in Concepts
NASIOC Vendor
 
Member#: 93646
Join Date: Aug 2005
Chapter/Region: MWSOC
Vehicle:
Many Track Records
Let us help you go fast!

Default

Drill out and bolt and nut with backing plate if you can get to the backside
Turn in Concepts is offline   Reply With Quote
Old 04-08-2010, 05:12 PM   #7
STi-MAN
Scooby Guru
 
Member#: 70252
Join Date: Sep 2004
Vehicle:
05 STI
blue

Default

^ im not sure if i can get to the back side.. its the right under the pillar stock seat belt mounting point.. i'll see what i can do.. im actually not even sure if its a m12 x 1.25 any more..
STi-MAN is offline   Reply With Quote
Old 04-09-2010, 07:21 AM   #8
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

If I'm not mistaken, the seat belt bolts are not M12x1.25 anyway. They are M11x1.25 (see also, special). Take a lug nut and try to thread it onto a known good seat belt anchor bolt, my guess is it'll slide right over it.

If this is the case, drill and tap it for an M12x1.25 bolt. If this doesn't work, you might as well go to 1/2" because M14 will not fit through most belt anchor plates. Another alternative is a helicoil kit for the size bolt you're using. I just did a tranny crossmember bolt hole on my Forester last weekend. Not fun, but relieving to get it done.

Good luck,
Jay
Storm is offline   Reply With Quote
Old 04-09-2010, 01:40 PM   #9
STi-MAN
Scooby Guru
 
Member#: 70252
Join Date: Sep 2004
Vehicle:
05 STI
blue

Default

^ sadly i think your right i took off a lug nut and it threads but wiggles like its a size too big.

I called schroth since the bolt in kit they sell has the same size and thread pitch of the oem and they say they supply a 7/16 size bolt.. but im not sure thats what i have.
STi-MAN is offline   Reply With Quote
Old 04-09-2010, 04:47 PM   #10
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

It very well could be a 7/16" size. I've heard that almost all mfgrs. use the same fastener size for seat belts across the board. A standard for the usage? Guess you'll have to go to a hardware store and size up the fastener first and foremost. Once you know what size you're working with, you can either try to clean the threads up with the same size tap, helicoil it back to the same size, or go to something bigger.

Good luck no matter what you do.
Jay
Storm is offline   Reply With Quote
Old 04-09-2010, 05:38 PM   #11
STi-MAN
Scooby Guru
 
Member#: 70252
Join Date: Sep 2004
Vehicle:
05 STI
blue

Default

^ you hit it on the mark.

its a 7/16 fine thread for anyone else that has this same thing happen to them..
STi-MAN is offline   Reply With Quote
Old 04-09-2010, 06:00 PM   #12
Wintershredder
Scooby Specialist
 
Member#: 160089
Join Date: Sep 2007
Chapter/Region: RMIC
Location: Denver
Vehicle:
2004 STi,330xi,328xi
WRB, Black, White

Default

Helicoil at the least. Its your life after all.
Wintershredder is offline   Reply With Quote
Old 04-09-2010, 06:06 PM   #13
IAG Performance
NASIOC Vendor
 
Member#: 158123
Join Date: Sep 2007
Chapter/Region: MAIC
Location: www.iagperformance.com
Default

It's funny but Subaru chose to use Standard on one of the rear seat bolts and Metric on the other. Very strange actually. You are correct though that it is 7/16 fine thread. As far as re-threading the hole....I would not use a heli-coil! You should use something better quality like a Time-sert. It is actually a steel insert rather than a wire like a heli-coil.



http://www.timesert.com/
IAG Performance is offline   Reply With Quote
Old 04-09-2010, 06:17 PM   #14
A5un
Scooby Newbie
 
Member#: 174095
Join Date: Mar 2008
Location: SoCal
Vehicle:
2011 EVO X MR
White

Default

Quote:
Originally Posted by Storm View Post
If I'm not mistaken, the seat belt bolts are not M12x1.25 anyway. They are M11x1.25 (see also, special). Take a lug nut and try to thread it onto a known good seat belt anchor bolt, my guess is it'll slide right over it.

If this is the case, drill and tap it for an M12x1.25 bolt. If this doesn't work, you might as well go to 1/2" because M14 will not fit through most belt anchor plates. Another alternative is a helicoil kit for the size bolt you're using. I just did a tranny crossmember bolt hole on my Forester last weekend. Not fun, but relieving to get it done.

Good luck,
Jay
I did the same cross-member hole too on my WRX, it was pain in the ass since I was not setup equipment wise for drilling anything, let alone tapping metals.

I would recommend some sort of thread insert kit, Helicoil or Timesert or some generic crap you can get from McMaster Carr. They all work just about the same. Being able to use the same OEM bolt makes things easier sometimes, though it may be more work up front trying to chase down your desired thread insert.
A5un is offline   Reply With Quote
Old 04-09-2010, 08:58 PM   #15
STi-MAN
Scooby Guru
 
Member#: 70252
Join Date: Sep 2004
Vehicle:
05 STI
blue

Default

I was able to retap the threads (i didnt strip the threads THAT bad).. every shop thought it was weird that it was a 7/16's thanks IAG for confirming that.. down the road i might do the timesert you were talking about.
STi-MAN is offline   Reply With Quote
Old 04-10-2010, 12:44 PM   #16
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

Awesome to hear. Others will hopefully be able to reference this thread for the times when this happens.

I'm not a big fan of the way Subaru made any of the chassis mounting points.

Jay
Storm is offline   Reply With Quote
Old 04-10-2010, 02:19 PM   #17
Scooby South
Subtly Outspoken
Moderator
 
Member#: 238
Join Date: Sep 1999
Chapter/Region: MWSOC
Location: 2013 STX National BRZ and a
Vehicle:
99 Ver6 Recreation
JDM Speedwagon 3 LSDs..:)

Default

Exactly what IAG reccomended...
Scooby South is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Chrome Spline drive Tuner lug nuts M12 X 1.25 TK421 SCIC Private Classifieds 3 09-07-2007 03:56 PM
FS: Chrome Spline drive Tuner lug nuts M12 X 1.25 TK421 Wheels/Tires 4 09-05-2007 04:43 PM
NEW- Racing lug nuts m12-1.25 19mm hex 60 taper open ended konigjim Tri-State Area Private Classifieds 0 03-27-2007 10:00 PM
Best next size up turbo? Hit Man X Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 10 04-12-2003 11:28 AM
When do we move from a Newbie to the next step up? BSmotorsportsRX Off-Topic 26 09-17-2002 11:13 AM


All times are GMT -4. The time now is 05:28 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.